CVE-2019-9808

critical
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
9.5

Description

If WebRTC permission is requested from documents with data: or blob: URLs, the permission notifications do not properly display the originating domain. The notification states "Unknown origin" as the requestee, leading to user confusion about which site is asking for this permission. This vulnerability affects Firefox < 66.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-9808

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201903-11

OS impact

OSVersionStatusFixed in
arch archfixed66.0-1
debian debiansidfixed66.0-1

References

Verify integrity in audit chain (admin only). AS-IS.